Chris V or anyone else

What does this thing do?

http://www.boats.net/parts/detail/yamaha/Y-63P-42643-01-00.html

one of mine on the front of the motor got clogged with salt and broke last week. Also should I pull out the top of the cowling and make sure there is no salt build up in there?

The one opposite it is fine and the hose is still clear.

Thanks!

COWLING DRAIN
REPLACE IT

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